Synchrotron Study of the Effect of Tantalum Variation on the Piezoelectric Modulus d11 in Langatate Crystal

The nonuniform distribution of chemical element ratios in a crystal of nominal composition La 3 (Ga 0.5 Ta 0.5 )Ga 5 O 14 has been determined using X-ray diffraction and X-ray fluorescence mapping on beamline 6.2 of the Kurchatov synchrotron radiation source “KISI-Kurchatov.” The Ga/Ta and La/Ta rat...

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Bibliographic Details
Published in:Crystallography reports 2022-12, Vol.67 (6), p.845-850
Main Authors: Gureva, P. V., Marchenkov, N. V., Kuz’micheva, G. M., Artemev, A. N., Demkiv, A. A.
Format: Article
Language:English
Subjects:
Crystal growth
Crystallography and Scattering Methods
Diffraction and Scattering of Ionizing Radiations
Physics
Physics and Astronomy
Piezoelectricity
Radiation sources
Synchrotron radiation
Synchrotrons
Tantalum
X-ray fluorescence
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Summary:The nonuniform distribution of chemical element ratios in a crystal of nominal composition La 3 (Ga 0.5 Ta 0.5 )Ga 5 O 14 has been determined using X-ray diffraction and X-ray fluorescence mapping on beamline 6.2 of the Kurchatov synchrotron radiation source “KISI-Kurchatov.” The Ga/Ta and La/Ta ratios are shown to increase from the center to the periphery of the crystal growth boule, which is accompanied by an increase in the number of oxygen vacancies leading to a decrease in piezoelectric modulus d 11 . The study is of practical importance for the creation of materials with desired properties.
ISSN:1063-7745
1562-689X
DOI:10.1134/S1063774522060098